Process of making alloys of zinc with copper.



PATENT OFI IOE.

STERLING ELLIOTT, OF NEWTON, MASSACHUSETTS.

PROCESS OF MAKING- ALLOYS OF ZINC WITH COPPER.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed October 12, 1908. Serial No. 457,284.

To all whom it may concern:

. Be it known that I, STERLING ELLIOTT, of Newton, county of Middlesex, State of Massachusetts, have invented an Improvement in Processes for Making Alloys of Zinc with Copper, of which the following is a specification.

This invention relates to an improved process for producing an alloy of zinc with copper.

The object of the invention is the production of the alloy at a temperature much less than the melting point of copper, whereby the expense of production is Very materially decreased and numerous other advantages gained incident to the employment of the greatly reduced. temperature as compared with the temperature ordinarily employed.

In carrying out my process I first melt the zinc, then add the copper to the molten zinc and then raise the temperature to the melt ing point of the alloy which is to be produced .or thereabout which is less than the melting point of copper and also less than the boiling point of zinc. The aflinity of the zinc for the copper causes the latter to be absorbed or dissolved to some extent even when the zinc is barely melted, and this effect is more marked in proportion as the pieces of copper are smaller in size, for the reason that a greater surface of copper will be exposed to the action of the molten zinc. However, I continue to raise the tem era ture of the mass until it reaches the me ting point of the alloy which-is to be produced or thereabout, to obtain an alloy having a perfectly homogeneous structure. For example; assuming the melting point of Zinc to be 412 C. and itsboiling point 1040 and the melting point of copper to be 1090 C. and the melting point of the alloy which is to be produced to be 973 C. it will be noted that when the co ppcr is placed in the molten zinc at 412 C. it begins to dissolve, but even so the temperature is raised. to 975. C. or thereabout, which, it will be noted is less than the melting poiut of the copper and also less than the boiling point of the zinc, yet is high enough to produce an alloy having a perfectly hon'iogcneous structure. In carrying out my process the zinc and subsequently the alloy will be covered with any well-known or suitable llux, such, for instance as charcoal or boraX.

STERLING ELLIOITI.

itnesses B. J. NOYES, H. B. DAvis.

Having thus described my invention, what 

